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dc.contributor.author
De La Fournière, Emmanuel M.
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Meichtry, Jorge Martin
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Custo, Graciela Susana
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Gautier, Eduardo Amilcar
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Litter, Marta Irene
dc.date.available
2022-08-16T11:45:09Z
dc.date.issued
2021-06
dc.identifier.citation
De La Fournière, Emmanuel M.; Meichtry, Jorge Martin; Custo, Graciela Susana; Gautier, Eduardo Amilcar; Litter, Marta Irene; New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product; Bentham Science Publishers; Journal of Photocatalysis; 2; 3; 6-2021; 1-11
dc.identifier.issn
2665-976X
dc.identifier.uri
http://hdl.handle.net/11336/165538
dc.description.abstract
Background: Thiomersal (TM), a complex between 2-mercaptobenzoic acid (2-MBA) and ethylmercury (C2H5Hg+), is an antimicrobial preservative used in immunological, ophthalmic, cosmetic products, and vaccines. Objective: TM has been treated by UV/TiO2 photocatalysis in the presence or absence of oxygen at acidic pH. C2H5Hg+, 2-MBA, and 2-sulfobenzoic acid (2-SBA) were found as products. A 2-SBA photocatalytic treatment was undertaken to study sulfur evolution. Methods: Photocatalytic runs were performed using a UVA lamp (λmax = 352 nm), open to air or under N2. A suspension of the corresponding TM or 2-SBA salt and TiO2 was prepared, and pH was adjusted. Suspensions were stirred in the dark for 30 min and then irradiated. TM, 2-MBA, 2-SBA, and C2H5Hg+ were quantified by HPLC, sulfur by TXRF, and the deposits on the photocatalyst were analyzed by chemical reactions. The mineralization degree was followed by TOC. Sulfate was determined using BaCl2 at 580 nm. Results: Photocatalytic destruction of TM and total C2H5Hg+ was complete under N2 and air, but TM degradation was much faster in air. The evolution of TM and the products followed a pseudo-first order kinetics. Conclusion: TiO2-photocatalytic degradation is a suitable technique for the treatment of TM and its degradation products. In contrast to other organomercurial compounds, TM degradation is faster in the presence of O2, indicating that the oxidative mechanism is the preferred pathway. A significant TM mineralization (> 60%, NPOC and total S) was obtained. TM was more easily degraded than 2-SBA. Sulfate was the final product.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Bentham Science Publishers
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
HETEROGENEOUS PHOTOCATALYSIS
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THIMEROSAL
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ETHYLMERCURY
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2-MERCAPTOBENZOIC ACID
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2-SULFOBENZOIC ACID
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TITANIUM DIOXIDE
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
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Otras Ingeniería Química
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Ingeniería Química
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INGENIERÍAS Y TECNOLOGÍAS
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Química Analítica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
New Insights on the UV/TiO2 Photocatalytic Treatment of Thiomersal and its 2-Sulfobenzoic Acid Product
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-08-16T00:46:17Z
dc.identifier.eissn
2665-9778
dc.journal.volume
2
dc.journal.number
3
dc.journal.pagination
1-11
dc.journal.pais
Países Bajos
dc.journal.ciudad
Soest
dc.description.fil
Fil: De La Fournière, Emmanuel M.. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina
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Fil: Meichtry, Jorge Martin. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
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Fil: Gautier, Eduardo Amilcar. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
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Fil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Journal of Photocatalysis
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2174/2665976X02666210629104521
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.eurekaselect.com/article/116381
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